// Copyright (C) 2013 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
es6id: 25.2
description: >
    When the `next` method of a generator-produced iterable is invoked without
    an argument, the corresponding `yield` expression should be evaluated as
    `undefined`.
features: [generators]
---*/

function Test() {
    function* g() { actual = yield; }
    var iter = g();
    var actual, result;

    result = iter.next();
    assert.sameValue(result.value, undefined);
    assert.sameValue(result.done, false);
    assert.sameValue(actual, undefined);

    result = iter.next();
    assert.sameValue(result.value, undefined);
    assert.sameValue(result.done, true);
    assert.sameValue(actual, undefined);
}

// preheat
const NUMBER_OF_PREHEAT = 1;
for (let i = 0; i < NUMBER_OF_PREHEAT; i++) {
    Test();
}

ArkTools.jitCompileAsync(Test);
assert.sameValue(ArkTools.waitJitCompileFinish(Test), true, '[JIT] JIT disabled.');

// test
const NUMBER_OF_TEST = 1; // or 2
for (let i = 0; i < NUMBER_OF_PREHEAT; i++) {
    Test();
}
